Doing a project for school

Hi all,
I’m doing a project for school but I have a problem with my static shadow when I build my lighting, the dynamic shadow before I build look great like they’re supposed to be but as soon as I do the build lighting the shadow of my smaller object are really stange looking and the one of my big are just looking out of place I didn’t work enough in unreal to have an idea of what is causing it if someone could help mefigure out the way to fix this I would be really grateful